AUTOMATIC TRANSMISSION SYSTEM TERMINALS OF ECU

Tech Tips

The standard voltage at each TCM terminal is shown in the table below.

In the table, first follow the information under "Condition". Look under "Terminal No. (Symbol)" for the terminals to be inspected. The standard voltage between the terminals is shown under "Specified Condition".

Use the illustration below as a reference for the ECU terminals.


  1. TCM

    A01L982E11
    Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
    G90-5 (BATT) - C77-1 (E1) W - W-B Battery (for measuring battery voltage and for TCM memory) Always 11 to 14 V
    C77-12 (NSW) - C77-1 (E1) L - W-B PNP switch signal

    • Ignition switch ON

    • Shift lever in P or N

    		 Below 1 V

    • Ignition switch ON

    • Shift lever not in P or N

    		 11 to 14 V
    C77-11 (STA) - C77-1 (E1) G - W-B Starter signal Cranking 6 V or higher
    C77-13 (P) - C77-1 (E1) LG - W-B P shift position switch signal

    • Ignition switch ON

    • Shift lever in P

    		 11 to 14 V

    • Ignition switch ON

    • Shift lever not in P

    		 Below 1 V
    G89-9 (R) - C77-1 (E1) R - W-B R shift position switch signal

    • Ignition switch ON

    • Shift lever in R

    		 11 to 14 V

    • Ignition switch ON

    • Shift lever not in R

    		 Below 1 V
    C77-14 (N) - C77-1 (E1) G - W-B N shift position switch signal

    • Ignition switch ON

    • Shift lever in N

    		 11 to 14 V

    • Ignition switch ON

    • Shift lever not in N

    		 Below 1 V
    G89-8 (D) - C77-1 (E1) P - W-B D shift position switch signal

    • Ignition switch ON

    • Shift lever in D

    		 11 to 14 V

    • Ignition switch ON

    • Shift lever not in D

    		 Below 1 V
    G90-15 (S) - C77-1 (E1) L - W-B S shift position switch signal

    • Ignition switch ON

    • Shift lever in S, "+" or "-"

    		 11 to 14 V

    • Ignition switch ON

    • Shift lever not in S, "+" or "-"

    		 Below 1 V
    G90-22 (SFTU) - C77-1 (E1) W - W-B Up-shift position switch signal

    • Ignition switch ON

    • Shift lever in S

    		 11 to 14 V

    • Ignition switch ON

    • Shift lever in "+" (Up-shift)

    		 Below 1 V
    G90-23 (SFTD) - C77-1 (E1) G - W-B Down-shift position switch signal

    • Ignition switch ON

    • Shift lever in S

    		 11 to 14 V

    • Ignition switch ON

    • Shift lever in "-" (Down-shift)

    		 Below 1 V
    C77-18 (S1) - C77-1 (E1) L - W-B S1 solenoid signal Ignition switch ON 11 to 14 V
    1st or 2nd gear 11 to 14 V
    3rd, 4th or 5th gear Below 1 V
    C77-17 (S2) - C77-1 (E1) G - W-B S2 solenoid signal Ignition switch ON Below 1 V
    2nd or 3rd gear 11 to 14 V
    1st, 4th or 5th gear Below 1 V
    C77-16 (SR) - C77-1 (E1) SB - W-B SR solenoid signal Ignition switch ON Below 1 V
    5th gear 11 to 14 V
    1st gear Below 1 V
    C77-9 (SL1+) - C77-8 (SL1-) GR - V SL1 solenoid signal Engine idling Pulse generation
    C77-7 (SL2+) - C77-6 (SL2-) W - R SL2 solenoid signal Engine idling Pulse generation
    C77-20 (SLT+) - C77-19 (SLT-) LG - P SLT solenoid signal Engine idling Pulse generation
    C77-22 (SLU+) - C77-21 (SLU-) B - Y SLU solenoid signal 4th gear (lock-up) or 5th gear (lock-up) Pulse generation
    C77-25 (THO1) - C77-23 (E2) L - G No. 1 ATF temperature sensor signal No. 1 ATF temperature: 115°C (239°F) or higher Below 1.5 V
    C77-24 (THO2) - C77-23 (E2) SB - G No. 2 ATF temperature sensor signal No. 2 ATF temperature: 115°C (239°F) or higher Below 1.5 V
    G90-14 (STP) - C77-1 (E1) SB - W-B Stop light switch signal Brake pedal is depressed 7.5 to 14 V
    Brake pedal is released Below 1.5 V
    C77-3 (NT+) - C77-2 (NT-) W - B Transmission revolution sensor (NT) signal Engine idling (shift lever in P or N)

    Pulse generation

    (See waveform 1)
    C77-30 (SP2+) - C77-29 (SP2-) P - L Transmission revolution sensor (SP2) signal Vehicle speed 20 km/h (12 mph)

    Pulse generation

    (See waveform 2)
    G89-15 (L4) - C77-1 (E1) Y - W-B L4 position signal

    • Ignition switch ON

    • Transfer in L4

    		 11 to 14 V

    • Ignition switch ON

    • Transfer not in L4

    		 Below 1.5 V
    G90-6 (IG2) - C77-1 (E1) P - W-B Ignition switch Ignition switch ON 11 to 14 V
    G90-25 (SPD1) - C77-1 (E1) V - W-B Vehicle speed signal Vehicle speed 20 km/h (12 mph)

    Pulse generation

    (See waveform 3)
    G90-21 (CAN+) - C77-1 (E1) G - W-B CAN communication line Ignition switch ON

    Pulse generation

    (See waveform 4)
    G90-20 (CAN-) - C77-1 (E1) V - W-B CAN communication line Ignition switch ON

    Pulse generation

    (See waveform 5)

    1. A01LBTVE01
      *a 1 V/DIV.
      *b 2 msec./DIV.

      Using an oscilloscope, check waveform 1.

      Reference
      Terminal No. (Symbol) Tool Setting Condition
      C77-3 (NT+) - C77-2 (NT-) 1 V/DIV., 2 msec./DIV. Engine idling (shift lever in P or N)
    2. A01LCMLE01
      *a 2 V/DIV.
      *b 20 msec./DIV.

      Using an oscilloscope, check waveform 2.

      Reference
      Terminal No. (Symbol) Tool Setting Condition
      C77-30 (SP2+) - C77-29 (SP2-) 2 V/DIV., 20 msec./DIV. Vehicle speed 20 km/h (12 mph)
    3. A01L8P9E02
      *a 2 V/DIV.
      *b 20 msec./DIV.

      Using an oscilloscope, check waveform 3.

      Reference
      Terminal No. (Symbol) Tool Setting Condition
      G90-25 (SPD1) - C77-1 (E1) 2 V/DIV., 20 msec./DIV. Vehicle speed 20 km/h (12 mph)
    4. A01LBRXE07
      *a 1 V/DIV.
      *b 10 msec./DIV.

      Using an oscilloscope, check waveform 4.

      Reference
      Terminal No. (Symbol) Tool Setting Condition
      G90-21 (CAN+) - C77-1 (E1) 1 V/DIV., 10 msec./DIV. Ignition switch ON
    5. A01LAOEE07
      *a 1 V/DIV.
      *b 10 msec./DIV.

      Using an oscilloscope, check waveform 5.

      Reference
      Terminal No. (Symbol) Tool Setting Condition
      G90-20 (CAN-) - C77-1 (E1) 1 V/DIV., 10 msec./DIV. Ignition switch ON